Apparatus for forming rims



Aug.25, 1953 H. A. PALMER 2,649,886

APPARATUS FOR FORMING R IMS 4 Sheets-Sheet 1 Filed April 4. 1949 e Il ...w 'lili/gill TIE- l.

INVENTOR. HARRY AAW/145x? Aug. 25, 1953 H. A. PALMER 2,649,886

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47 46 llll-llllll 3/ JNVENTOR. #meer ,4. Pun/1f@ Aug.l 25, 1953 l H. A. PALMER v 2,649,886

APPARATUS FOR FORMING RIM's l Filed April 4, 1949 K 4 Sheets-Sheet 3 INVENToR.

HAR/ey A. PAL/w52 A T'OR/VEYS Aug. 25, `1953l H APAL'M'E'R.

' rvAP1= ARA'1US FOR FORMING ,RIMS

4 Sheets-Sheet 4 Filed April 4, 1949 INVENToR. #naar .4 P40145? Afrox/Vins* Patented Aug. 25, 1953 APPARATUS Foa FoRMiNG RIMS Harry Ai Palmer, Birmingham, Mich., assignor to Kelsey-Hayes Wheel Company, Detroit, Mich., a corporation of Delaware Application April 4, 1949, Serial No. 85,447

3 claims.

The invention relates to apparatus for forming a rim from an annular blank andrefers more particularly to die apparatus for pressing an annular blank to the desired cross sectional contour of the rim.

'The invention has for one of its objects to provide an improved apparatus having die sections operable on the annular blank and a rotatable cam ring for electing the movement of certain of the die sections in unison.

The invention has for another object to provide an improved apparatus having means on the bolster and ram for guiding and retaining the die sections during their operation on the annular blank.

The invention has for a further object to provide the apparatus with improved means for removing the formed rim.

With these and other objects in View the invention resides in the novel features of construction and combinations and arrangements of parts as more fully hereinafter set forth.

In the drawings:

Figure 1 is a cross section on the line I-I of `Figure 3 through a rim forming apparatus embodying the invention and showing the parts in positions assumed when the ram is in its lowermost position;

Figure 2 is a similar View showing the parts in positions assumed during the raising of the ram.

Figure "3 is a cross section on the line 3-3 of Figure 1.

Figure 4 is a cross section on the line 4-4 of Figure 2.

Figure 5 is a top plan view with the ram removed.

Figure 6 is a cross section on thevline 6-6 0f Figure l.

In general, the rim forming apparatus is a press having outer die sections movable radially inwardly into engagement with an annular blank and inner die sections relatively movable axially toward each other and into engagement with the blank and cooperating with the-outer die sections to shape the blank to the desired cross Sectional contour. In the present instance, the outer die sections comprise the segmental die sections I arranged in an annular series and supported on the plate 2 which is vertically movable relative t0 the bolster 3. The inner die sections comprise the axiallyaligned lower'and upper annular die sections 4 and 5 respectively, the lower die section being mounted on the bolster 3 and the upper die section being mounted on the ram 6 whichkis vertically movable axially of the bolster.

Each outer die section I is keyed and xedly secured to the holder 'I having concentric inner and outer faces 8 and 9 respectively, the outer die section being secured against the inner face. The holder is slidable in the radial channel I0 in the upper portion of the plate 2 and is slidably engaged by the gibs I I secured to the plate. The plate is guided and centered with respect to the bolster by the pairs ofv diagonally opposite short and long pins i2 and I3 respectively and is mounted on the annular supporting plate I4 which is above the bolster. The supporting plate is centered with respect to the bolster by the upwardly extending annular ange I5 at the inner edge of the supporting plate tting the central opening I6 of the. plate 2, this central opening having its center in axial alignment with the center of the bolster.

For radially moving the holders 'I and consequently the outer die Sections I in unison, there is the cam ring I'I rotatably mounted on the supporting plate I4 and located Within and guided by the recess I8 in the lower portion of the plate 2 and concentric with its central opening. The

cam ring is formed with the cam slots I9 correspondingly inclined to the radii passing through the slots and the plate 2 is provided with the radial slots 20 intersecting the cam slots I9. 2I are vertical pins secured to and depending from the holders 'I and extending through the radial slots and Within the .cam slots, there being a single pin, single radial slot and single cam slot for each holder. Each pin has an enlarged portion slidably engaging its associated radial slot and has journaled on its lower end the roller 22 engaging the associated cam slot.

To rotate the cam ring it has secured thereto the arm 23 having connected to its outer end the rod 24 of a pistonslidable in the vcylinder 25. This cylinder is carried by the bracket 26 which is mounted on one corner of the plate 2. The cylinder is provided with ports at its ends for admitting and exhausting compressed air to move the piston in opposite directions and thereby rotate the cam ring in opposite directions through a predetermined distance.

The lower inner die section i is secured to the upper face of the central plate 21 which is secured to the upper face of the bolster 3 and cen- 'tered by fitting within the annular recess 28 of the bolster. The lower die section also secures the ,annular sleeve 29 to the central plate, this sleeve having its upper end portion extending above the upper surface ofl the lower die section. The sleeve is centered by telescopically engaging raise the rim. The raising is continued to provide space beneath the rim for the insertion of the conventional shovel after which the arms 48 of the rim removing devices contact with the stationary pin 62 which compels the L-shaped members to swing to positions releasing the iingers 53 from tbe rim so that it may drop onto the shovel.

What I claim as my invention is:

1. An apparatus for forming a rim from an annular blank comprising a bolster, an annular die section xedly mounted on said bolster, a plate movable axially relative to said bolster, a second plate mounted on said rst mentioned plate, an annular series of radially movable outer die sections on said second plate, a rotatable cam ring on said rst mentioned plate and guided by said second plate and operatively connected to said. louter die sections, and a second annular die section axially aligned with said rst mentioned annular die section and movable axially toward the same.

2. An apparatus for forming a rim from an annular blank comprising a bolster, an annular inner die section fixedly on said bolster, a plate above and movable vertically relative to said bolster, a second plate mounted on said iirst mentioned plate, a cam ring mounted on said first mentioned plate and guided by said second plate, an annular series of outer die sections each radially movable on said second plate, means Acomprising pins operatively connected to said outer die sections and cam ring for moving said die sections upon rotation of said cam ring, means for yieldably urging said iirst mentioned plate to a position spaced above said bolster, a ram and an annular inner die section carried by said ram movable axially toward said first men- 6 tioned inner die section, said second mentioned inner die section being operable through the material forming the blank to lower said rst mentioned plate against said bolster.

3. An apparatus for forming a rim from an annular blank comprising a bolster, a ram movable toward and away from said bolster, axially aligned annular die sections mounted on said bolster and ram, an annular series of die sections movable radially toward and away from said rst mentioned die sections and movable toward and away from said bolster and means for initially positioning the annular blank comprising radially movable plungers engageable with the lower edge of the 'annular blank and movable with said annular series of die sections toward and away from said bolster and having cam engagement with the one of said first mentioned die sections mounted on said bolster.

HARRY A. PALMER.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,373,572 Smith Apr. 5, 1921 1,365,405 Howard Jan. 11, 1921 1,433,818 Hill Oct. 31, 1922 1,469,360 Cullen Oct. 2, 1923 1,539,800 Brainard May 26, 1925 1,562,813 Wagenhorst Nov. 24, 1925 1,854,630 Sickler Apr. 19, 1932 1,944,527 Ffaendler Jan. 23, 1934 2,101,888 Ambrosius Dec. 14, 1937 2,278,643 Braun Apr. '7, 1942 2,293,287 Franz Aug. 18, 1942 2,295,852 Le Jeune Sept. 15, 1942 2,313,748 Hothersall Mar. 16, 1943 

